Effect of iron deficiency on the chemical composition of the xylem sap of barley

被引：26

作者：

Alam, S ^{[1
]}

Kamei, S ^{[1
]}

Kawai, S ^{[1
]}

机构：

[1] Iwate Univ, Fac Agr, Morioka, Iwate 0208550, Japan

来源：

SOIL SCIENCE AND PLANT NUTRITION | 2001年 / 47卷 / 03期

关键词：

amino acids; iron deficiency; organic acids; phytosiderophore; xylem sap;

D O I：

10.1080/00380768.2001.10408428

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Barley (Hordeum vulgare L.) plants were grown hydroponically, and the effect of Fe deficiency on the concentration of essential metals, phytosiderophores (PS), organic acids, and amino acids, in the xylem sap was elucidated. The Fe-deficient plants exuded xylem sap at a rate about 2.4-fold lower than the Fe-sufficient plants. Under Fe deficiency, the concentration of Fe decreased compared with that of Fe-sufficient plants, while the concentrations of K, Ca, and Mg were not significantly different, and those of fin, Zn, and Cu increased by Fe deficiency. The concentration of PS in the xylem sap of the Fe-deficient plants was about 24-fold higher than that of the Fe-sufficient plants. The concentrations of citrate, malate, and succinate in the xylem sap increased 7.3-fold, 2.0-fold, and 1.8-fold, respectively, with Fe deficiency compared to those of the Fe-sufficient plants. The xylem concentration of total amino acids increased 1.4-fold by Fe deficiency.

引用

页码：643 / 649

页数：7

共 27 条

[1] Metal micronutrients in xylem sap of iron-deficient barley as affected by plant-borne, microbial, and synthetic metal chelators [J].